Questions from Quiz and Test from Chapter 12

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The three-nucleotide codon system can be arranged into _____ combinations.

64

If an mRNA codon reads UCA, its complimentary anticodon will be

AUG.

Which of the following is not associated with translation? rRNA mRNA RNA polymerase DNA

DNA

True or False During transcription, both strands of DNA serve as a template for the synthesis of mRNA.

False

True or False Genes can be turned on by the binding of a repressor.

False

True or False The coding portions of most eukaryotic genes are embedded as introns with long sequences of non-coding exons.

False

True or False Each amino acid is specified by a codon.

True

True or False RNA polymerase binds to a strand of DNA and moves along the strand to make mRNA.

True

True or False Repressors block transcriptions by binding to the DNA

True

True or False The codon GCU specifies the amino acid alanine.

True

True or False The genetic code is universal.

True

Each amino acid in a protein is specified by

a codon.

The direct result of translation is

a protein

Where an mRNA leaves the cell's nucleus, it next becomes associated with

a ribosome.

The use of information in DNA to direct the production of particular proteins is called

gene expression.

After transcription, the mRNA molecule must _______ before it is translated into a protein molecule.

have its introns removed

The direct result of transcription is

mRNA

Which of the following unctions as the "blueprint" copies of nuclear genes? rRNA mRNA tRNA

mRNA

The genetic code is made up of

mRNA codons.

During translation, the mRNA molecule

moves between the two subunits of the ribosome.

Which of the following is not a type of RNA? nRNA (nuclear RNA) MRNA (messenger RNA) rRNA (ribosomal RNA) tRNA (transfer RNA)

nRNA (nuclear RNA)

DNA leaves the nucleus

never.

The site where RNA polymerase attaches to the DNA molecule to start the formation of an RNA molecule is called a(n)

promoter.

Which of the following is not associated with transcription? rRNA mRNA RNA polymerase DNA

rRNA

A(n) _____ is composed of 2 subunits, one nested into the other like a fist in the palm of your hand.

ribosome

Regarding the activity level of genes,

some genes are always off unless a repressor is not bound.

In the process of translation, the amino acids are arranged to form specific proteins because they are attached to

tRNA

_____ forms hairpin loops due to the hydrogen bonding that forms between its nucleotides with an amino acid attached to it's free -OH end.

tRNA

The process of obtaining a copy of the information in a gene as a strand of messenger RNA is called

transcription.

The process of taking the information on a strand of messenger RNA and building an amino acid chain that will become all or part of a protein molecule is called

translation.


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